The native species, subspecies and varieties listed below were not recorded during the current survey of the county. Names in bold are those that are likely to be truly extinct in Co. Waterford. The others are just likely to be over-looked as they are not easy to name. The date given is the last year that the species was known to have been seen in the county.

Achillea ptarmica – Sneezewort – before 1934

Antennaria dioica– Mountain Everlasting – before 1866

Anthriscus caucalis– Bur Chervil – 1971

Asplenium viride– Green Spleenwort – 1894

Bromus commutatus– Meadow Brome – 1900

Carex acuta – Slender Tufted-sedge – 1882

Carex elata– Tufted-sedge – 1882

Cephalanthera longifolia – Narrow-leaved Helleborine – 1894

Ceratophyllum demersum– Rigid Hornwort – before 1866

Chamaemelum nobile– Chamomile – 1746

Cladium mariscus– Great Fen-sedge – 1954

Cochlearia officinalis x C. danica – 1961

Cuscuta epithymum – Dodder – 1967

Cynoglossum officinale – Hound’s-tongue – 1899

Dactylorhiza purpurella– Northern Marsh-orchid – 1973

Dactylorhiza x venusta – 1973

Epipactis palustris – Marsh Helleborine – 1977

Erophila glabrescens – Glabrous Whitlowgrass – 1964

Erodium maritimum – Sea Stork’s-bill – before 1866

Euphorbia peplis– Purple Spurge – 1839

Euphrasia anglica – Glandular Eyebright– 1952

E. nemorosa – Common Eyebright– 1966

E. rostkoviana subspecies rostkoviana – 1988

Filago vulgaris– Common Cudweed – 1882

Galium boreale– Northern Bedstraw – 1859

Gentianella campestris – Field Gentian – 1882

Gnaphalium sylvaticum – Heath Cudweed – 1900

Gymnadenia conopsea – Fragrant Orchid – 1900

Hieracium argenteum – Killarney Hawkweed – 1882

H. cerinthiforme – Clasping-leaved Hawkweed – 1975

Juncus subnodulosus – Blunt-flowered Rush – 1950s

Lobelia dortmanna– Water Lobelia – 1973

Lycopodium clavatum– Stag’s-horn Clubmoss – 1900

Ononis repens var. horrida – 1882

Ophrys apiferavar. chlorantha– 1978

Orchis morio – Green-winged Orchid – 1901

Otanthus maritimus – Cottonweed – 1883

Parentucellia viscosa – Yellow Bartsia – 1880

Parnassia palustris – Grass-of-Parnassus – 1897

Pilosella officinarum subsp. micradenium – 1975

Platanthera bifolia – Lesser Butterfly-orchid – 1973

Platanthera chlorantha – Greater Butterfly-orchid – 1900

Polygonum maritimum– Sea Knotgrass – 1974

Potamogeton x nitens – Bright-leaved Pondweed – 1899

Pseudorchis albida – Small-white Orchid – 1891

Puccinellia fasciculata – Borrer’s Saltmarsh-grass – 1925

Radiola linoides– Allseed – before 1866

Ranunculus lingua– Greater Spearwort – 1977

Rhinanthus minor subsp. minor – 1950s

Rubus adenanthoides – 1975

R. aequalidens – 1992

R. asperidens – 1992

R. cinerosiformis – 1992

R. hastiformis – 1992

R. lindleianus – 1984

R. micans – 1984

R. moylei – 1992

R. riddelsdellii – 1965

R. winteri – 1992

Schoenus nigricans– Black Bog-rush – before 1934

Scirpus sylvaticus– Wood Club-rush – 1884

Scutellaria x hybrida– 1871

Stachys officinalis – Betony – 1886

Taraxacum drucei – Druce’s Dandelion – 1985

T. landmarkii – Landmark Dandelion – 1977

T. naevosiforme – Wetland Dandelion – 1985

T. palustre – Fen Dandelion – 1962

Utricularia minor – Lesser Bladderwort – 1962

Utricularia vulgaris – Greater Bladderwort – 1967

Listed below are species that have appeared in print but are errors or likely errors. See species accounts for full information.